A Stiffness-Switchable, Biomimetic Smart Material Enabled by Supramolecular Reconfiguration.

Area of Science:

• Materials Science
• Supramolecular Chemistry
• Biomimetics

Background:

• Stiffness-changing capabilities are vital in nature but difficult to replicate in synthetic materials.
• Living organisms exhibit adaptable mechanical properties crucial for survival and function.
• Synthetic materials often lack the dynamic mechanical response seen in biological systems.

Purpose of the Study:

• To engineer a synthetic material with switchable stiffness inspired by natural systems.
• To mimic the sea cucumber's dermal structure for advanced material design.
• To create a material with tunable mechanical properties for diverse applications.

Main Methods:

• Development of interchangeable supramolecular configurations.
• Inspiration from the sea cucumber's dermis for material architecture.
• Stimulation using ethanol to induce supramolecular configuration changes.

Main Results:

• The material exhibits a 500-fold increase in stiffness (0.51 MPa to 243.6 MPa) upon ethanol stimulation.
• Achieved outstanding load-bearing capacity (over 35,000 times its weight) and impact resistance.
• Demonstrated reconfiguration-dependent self-healing and designable formability.

Conclusions:

• The developed smart material offers extreme, switchable mechanical properties.
• This biomimetic material shows potential for high-strength, durable, and formable applications.
• Opens new avenues for self-regulating materials through supramolecular configuration control.